CN105278160A - 背光单元、背光模组及显示装置 - Google Patents

背光单元、背光模组及显示装置 Download PDF

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CN105278160A
CN105278160A CN201510724162.4A CN201510724162A CN105278160A CN 105278160 A CN105278160 A CN 105278160A CN 201510724162 A CN201510724162 A CN 201510724162A CN 105278160 A CN105278160 A CN 105278160A
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backlight module
plate
lamp source
groove
back light
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CN105278160B (zh
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樊勇
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
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Abstract

本发明提供一种背光模组，其包括背板、数个背光单元及扩散板，所述背板形成容纳槽，所述背光单元包括主反射片、设于所述主反射片的反射面上的导光板、灯源及副反射片；所述导光板包括出光面及位于出光面中部的凹槽，所述灯源设于凹槽内，所述副反射片装于所述出光面上并遮盖所述凹槽，所述副反射片的反射面朝向所述灯源；所述数个背光单元间隔排列于所述容纳槽的底面，所述扩散板封闭所述容纳槽与所述出光面相对设置。本发明还公开了一种显示装置。

Description

背光单元、背光模组及显示装置
技术领域
本发明涉及显示技术领域，特别涉及一种背光单元、背光模组、背光模组及显示装置。
背景技术
液晶显示器是当今市场上的主流显示装置技术。而显示装置都需要背光来作为光源点亮液晶显示器。传统的背光模组主要分为直下式背光和侧入式背光。侧入式背光需要导光板，导光板尺寸越大，成本越高。直下式厚度较厚，为了减小灯箱厚度，主要采取增加灯的数目或增加LED透镜扩大光分布的方式来实现，采取这两种方式，在大尺寸的情况下成本更高。
因此随着大尺寸显示器等显示装置竞争越来越激烈，提升大尺寸的规格并降低成本成为提升产品竞争力的重要考量。如何实现大尺寸直下式背光的薄型化，并降低直下式背光的成本，成为目前技术开发的重要方向。
发明内容
本发明提供一种背光单元及背光模组，以实现背光模组薄型化而节省成本的目的。
本发明还提供一种显示装置。
本发明提供的背光单元包括主反射片、设于所述主反射片的反射面上的导光板、灯源及副反射片；所述导光板包括出光面及位于出光面中部的凹槽，所述灯源设于凹槽内，所述副反射片装于所述出光面上并遮盖所述凹槽，所述副反射片的反射面朝向所述灯源。
所述背光模组包括背板、数个背光单元及扩散板，所述背板形成容纳槽，所述背光单元包括主反射片、设于所述主反射片的反射面上的导光板、灯源及副反射片；所述导光板包括出光面及位于出光面中部的凹槽，所述灯源设于凹槽内，所述副反射片装于所述出光面上并遮盖所述凹槽，所述副反射片的反射面朝向所述灯源；所述数个背光单元间隔排列于所述容纳槽的底面，所述扩散板封闭所述容纳槽与所述出光面相对设置。
其中，所述数个背光单元成矩阵排列设置，每两个背光单元之间设有支撑体，所述支撑体相对两端分别抵持所述底面与所述扩散板。
其中，所述背光单元还包括散热器，所述散热器设于所述主反射片朝向所述底面的表面上并与所述灯源所在位置相对。
其中，所述副反射片的反射率大于所述主反射片的反射率。
其中，所述凹槽贯穿所述导光板，所述灯源于凹槽内装于所述主反射片上。
其中，所述背板包括底板及设于底板周缘的侧板，所述侧板与所述底板共同围成所述容纳槽，所述底板的位于容纳槽内的表面为所述底面。
其中，所述侧板包括连接段及有连接段延伸的斜边，所述连接段与所述底板连接，所述斜面连接连接段与所述扩散板，所述连接段与所述斜边朝向所述容纳槽的表面设有侧反射片。
其中，所述背光模组还包括光学薄膜，所述光学薄膜设于所述扩散板出光方向的表面上。
其中，所述灯源为CSP封装LED灯。
本发明还提供一种显示装置，其包括以上所述的背光模组及液晶面板，所述液晶面板装于背光模组上与所述导光板出光面相对设置。
本发明所述背光模组由数个独立的背光单元提供光源，每个背光单元使用独立的导光板供单个的灯源使用，在导光板材料上得到充分利用，可以保证光线的分布，无需增加光线扩大透镜，节省背板厚度尺寸，相较于使用整体导光板节省成本。
附图说明
为了更清楚地说明本发明的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以如这些附图获得其他的附图。
图1是本发明较佳实施方式中的背光模组的背光单元结构示意图。
图2是本发明的背光模组整体结构的截面的示意图。
图3是本发明具有背光模组的显示装置的截面示意图。
具体实施方式
下面将结合本发明实施方式中的附图，对本发明实施方式中的技术方案进行清楚、完整地描述。
请参阅图1与图2，本发明一种背光单元及背光模组10，背光单元做为背光模组的光源，所述背光模组用于显示装置中为显示装置提供光源。所述背光模组10为直下式，其包括背板11、数个背光单元13及扩散板15。所述背板11形成容纳槽12。所述背光单元13包括主反射片131、设于所述主反射片131的反射面上的导光板132、灯源133及副反射片134。所述导光板132包括出光面135及位于出光面中部的凹槽136，所述灯源133设于凹槽136内。所述副反射片134装于所述出光面135上并遮盖所述凹槽136。所述副反射片134的反射面朝向所述灯源133。所述数个背光单元13间隔排列于所述容纳槽12的底面121，所述扩散板15封闭所述容纳槽12与所述出光面135相对设置。
所述背光模组10由数个独立的背光单元提供光源，每个背光单元使用独立的导光板132供单个的灯源133使用，在导光板材料上得到充分利用，可以保证光线的分布，无需增加光线扩大透镜，节省背板整体空间及厚度尺寸；而且对于大尺寸背光模组来说，在成本上相比使用整体的导光板更具有成本效益。同时，所述灯源133为CSP封装LED灯，功率较大，可以5面发光，在不需要增加灯源数量的基础上，与所述背光单元13配合可以降低光源成本，整体上不需要增加背板的厚度空间即可保证足够的光源效率。
本实施例中，所述背板11包括底板111及设于底板111周缘的侧板112。所述侧板112与所述底板111共同围成所述容纳槽12，所述底板111的位于容纳槽12内的表面为所述底面121。进一步的，所述侧板112包括连接段114及有连接段114延伸的斜边115，所述连接段114与所述底板111连接，所述斜面115连接连接段114与所述扩散板15，所述连接段114与所述斜边115朝向所述容纳槽12的表面设有侧反射片116。侧反射片116可以避免背板11侧边位置出现亮带或暗框的现象。
本实施例中，所述容纳槽12大致为矩形槽状，所述扩散板15周缘抵持所述侧板112将所述容纳槽12封闭，所述扩散板15用于打散光通量，让光均匀分布还可以控制出射角度。所述扩散板15出光方向的表面上还叠加设有光学薄膜16。所述光学膜片16用于将入射的光源光线均匀扩散而变成发散光源射出，这样光线变得非常均匀，可以背解决光模组产生的光斑问题。
进一步的，所述数个背光单元13成矩阵排列设置，每两个背光单元13之间设有支撑体14，所述支撑体14相对两端分别抵持所述底面121与所述扩散板15。所述支撑体14支撑所述扩散板15，以保持背光单元13与扩散板15之间有一定的混光距离，并避免扩散板15塌陷。
本实施例中，所述主反射片131放置于所述容纳槽12的底面121上，所述主反射片131的反射面朝向所述灯源133，所述副反射片134位于导光板132的出光面135上，副反射片134的反射面1341朝向所述灯源133。所述凹槽136贯穿所述导光板132，所述灯源133于凹槽136内装于所述主反射片131上。其中，所述凹槽136的两个相对侧壁137、主反射片131及副反射片134共同围成一空间，所述灯源133位于空间内。其中，所述副反射片134的反射率大于所述主反射片141的反射率。
当所述背光模组灯源133工点亮作时，所述灯源133的光线部分经过所述凹槽136的两个相对侧壁137进入所述导光板132，通过导光板132的出光面135射出，最后经所述扩散板15及光学薄膜16作用后射出背光模组；所述灯源133还有部分光线经主反射片131及副反射片134反射后再进入所述导光板132，然后通过导光板132的出光面135射出，将所述灯源133的光线充分利用。
进一步的，所述背光单元13还包括散热器138，所述散热器138设于所述主反射片131朝向所述底面121的表面上并与所述灯源133所在位置相对，可以实现对灯源133的散热。
请参照图3，本发明还提供一种显示装置，其包括所述的背光模组10及液晶面板20，所述液晶面板20装于背光模组10上与所述导光板132出光面相对设置。通过透过所述光学膜片16的光线为所述液晶面板20提供光源，进而实现画面显示。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (10)

1.一种背光单元，其特征在于，所述背光单元包括主反射片、设于所述主反射片的反射面上的导光板、灯源及副反射片；所述导光板包括出光面及位于出光面中部的凹槽，所述灯源设于凹槽内，所述副反射片装于所述出光面上并遮盖所述凹槽，所述副反射片的反射面朝向所述灯源。
2.一种背光模组，其特征在于，所述背光模组包括背板、数个背光单元及扩散板，所述背板形成容纳槽，所述背光单元包括主反射片、设于所述主反射片的反射面上的导光板、灯源及副反射片；所述导光板包括出光面及位于出光面中部的凹槽，所述灯源设于凹槽内，所述副反射片装于所述出光面上并遮盖所述凹槽，所述副反射片的反射面朝向所述灯源；所述数个背光单元间隔排列于所述容纳槽的底面，所述扩散板封闭所述容纳槽与所述出光面相对设置。
3.如权利要求2所述的背光模组，其特征在于，所述数个背光单元成矩阵排列设置，每两个背光单元之间设有支撑体，所述支撑体相对两端分别抵持所述底面与所述扩散板。
4.如权利要求2所述的背光模组，其特征在于，所述背光单元还包括散热器，所述散热器设于所述主反射片朝向所述底面的表面上并与所述灯源所在位置相对。
5.如权利要求2所述的背光模组，其特征在于，所述副反射片的反射率大于所述主反射片的反射率。
6.如权利要求2-5任一项所述的背光模组，其特征在于，所述背板包括底板及设于底板周缘的侧板，所述侧板与所述底板共同围成所述容纳槽，所述底板的位于容纳槽内的表面为所述底面。
7.如权利要求6所述的背光模组，其特征在于，所述侧板包括连接段及有连接段延伸的斜边，所述连接段与所述底板连接，所述斜面连接连接段与所述扩散板，所述连接段与所述斜边朝向所述容纳槽的表面设有侧反射片。
8.如权利要求2-4任一项所述的背光模组，其特征在于，所述背光模组还包括光学薄膜，所述光学薄膜设于所述扩散板出光方向的表面上。
9.如权利要求2-5任一项所述的背光模组，其特征在于，所述灯源为CSP封装LED灯。
10.一种显示装置，其特征在于，包括权利要求1-9任一项所述的背光模组及液晶面板，所述液晶面板装于背光模组上与所述导光板出光面相对设置。
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